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| 题号 | 状态 | 题目名称 | 标签 | 通过率 | |
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| L9001 | [CEOI 2022] Parking | 图论建模 栈 模拟 |
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| L9002 | [RC-07] 心跳 |
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| L9003 | [RC-07] Game Theory |
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| L9004 | [RC-07] Abnormal Permutation Tuples |
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| L9005 | [RC-07] 超超立方体 |
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| L9006 | [入门赛 #9] 神树大人挥动魔杖 (Hard Version) |
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| L9007 | [入门赛 #9] 最澄澈的空与海 (Hard Version) | 数学 数论 素数判断,质数,筛法 逆元 |
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| L9008 | [入门赛 #9] 大碗宽面 (Hard Version) |
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| L9009 | [入门赛 #9] 牵连的世界 (Hard Version) |
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| L9010 | [USACO23JAN] Leaders B | 贪心 |
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| L9011 | [USACO23JAN] Air Cownditioning II B | 深度优先搜索 DFS 差分 |
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| L9012 | [USACO23JAN] Moo Operations B | 贪心 分类讨论 |
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| L9013 | [USACO23JAN] Find and Replace S | 图论建模 基环树 |
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| L9014 | [USACO23JAN] Following Directions S | 搜索 深度优先搜索 DFS 模拟 |
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| L9015 | [USACO23JAN] Moo Route S | 贪心 构造 |
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| L9016 | [USACO23JAN] Find and Replace G | 字符串 搜索 递归 |
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| L9017 | [USACO23JAN] Lights Off G | 状压 DP |
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| L9018 | [USACO23JAN] Moo Route G | 组合数学 排列组合 |
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| L9019 | [USACO23JAN] Tractor Paths P | 最短路 贪心 倍增 |
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| L9020 | [USACO23JAN] Mana Collection P | 状压 DP 凸包 李超线段树 |
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